| PATENT ASSIGNEE'S COUNTRY | France |
| UPDATE | 09.99 |
| PATENT ASSIGNEE | This data is not available for free |
| PATENT CLAIMS |
- SiO2 (45-68%) - Al2O3 (2-20 %) - ZrO2 (< 20%) - Boria (0.5-4%) - Na2O (4-11%) - K2O (3.5-7 %) - CaO (1-13%) - MgO (< 8 %) - SiO2+Al2O3+ZrO2 (< 70 %) - Na2O+K2O (> 8%) Said compn having - Strain point > 530C - Coefficient of thermal expansion (80-95)x0.0000007 1/C |
| PATENT PHOTOCOPY | Available on request |
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